Combination-padlock.



un. 685,|35. 'Patented out. 22, 19m.V

T. W. HART.

COMBINATION PADLOCK.

(Application med June 12, 1901.)

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THOMAS WILLIAMS HART, OF EBENEZ'ER, SOUTH CAROLINA, ASSIGNOR TO VILLIAML. I'IARR'ELL, OF HOWE, SOUTH CAROLINA.

COIVIB'INATION-PADLOCK.

SPECIFICATION 'forming part of Letters Patent'NO. 685,135, dated October22, 1901. Application lerl June l2, lirlOl.Y Serial No. 64,241. (Nomodel.)

To all whom, it may concern:

- Be it known that I, THOMAS WILLIAMS HART, of Ebenezer, in the countyof Florence and State of South Carolina, have invented a new and usefulImprovement in Combination- Padlocks, of which the following is aspecifiends project outside of the case; and it consists in the peculiarconstruction and arrangement of the parts of the same, which I will nowproceed to describe with reference to theA drawings, in which Figure lis an inside view of the lock With the face-plate removed. Fig. 2 is atransverse section on line 2 2 of Fig. l. Fig. 3 is a longitudinalsection on line 3 3 of Figs. l and 4. Fig. 4 is a view of the series oflockingbars, showing the different positions of their notches. Fig. 5 isa similar view of said bars, showing the position of the same necessaryto bring their notches into coincidence or alinement to permit theremoval of the shank of the keeper; and Fig. 6 is a View of the casewith the shank of the keeper pulled out and the locking-bars removed.

In the drawings, A represents the case of the lock, which is anelongated block of cast metal having a single central longitudinalgroove a intersected by a series of transverse grooves a', of whichlatter there may be any desired number, but are here shown as six. Thekeeper consists of a head B, formed on or east with an elongated shankB,which has a series of cross-notches h, corresponding in number, size,and position to the transverse grooves of the case. This shank slides inand closely lits the longitudinal groove a of the case, and whenentirely forced-in its notches b coincide with the cross-grooves a ofthe case.

ASliding in the cross-grooves of the case and also in the notches of theshank of the keeper are a series of transverse lockingbars C, each 0fwhich has on its ends outside of the case 4enlarged heads c sufficientlyfar apart to perA 4mit a denite sliding motion of said bars in thetransverse grooves of the case. Each bar has on its under side a notchc', of a size adapted to receive the shank of the keeper, and these barsare all alike, with the single except-ion that the location of the notchin relation to the ends of the bars varies for each bar. When these barshave their heads all in line, as in Fig 4, their notches c are out ofline and the solid portions of the bars lie in the grooves of the shankof the keeper and prevent the latter from being pulled out; but when thenotches are arranged in line, as in Fig. 5, the notches all coincide andthe shank of the keeper can be Withdrawn. The positions of these barsnecessary to unlocking is prearranged, and this position forms the keyof the combination, which may be changed at will by putting the bars indierent transverse grooves of the ease.

The head of the keeper is made with a double or symmetrical constructionof hooks h h, either one of which may be hooked into the hasp, staple,or other attachment of the door or other part to be secured, and thesehooks when the keeper is forced all the way in lap down upon each sideof the case to inclose said hasp or staple and also to form a brace toresist any twisting strain on the keeper.

D is the bridge-piece for the case, which extends across the shank ofthe keeper from side to side of the case and is swaged, riv'- eted, orotherwise secured to the case to retain the said shank and to preventthe side of the case from being forced in, which might cramp or bind theshank in the case and pres vent said shank from sliding freely.

E is a face-plate, which is riveted to the sides of the case, so as tocompletely inclose the shank and sliding locking-bars.

To prevent the keeper from passing entirely out of the case and becomingdetached, a groove g is formed longitudinally in the back side of theshank, and a stop-pin p in the case protudes into said groove and limitsthe outward movement of the shank. A pin o on the front of the keeperalso enters a notch n in the case and avoids twisting strain on theshank when the keeper is locked.

My invention is intended for use as stock= IOO locks, door-locks, or anyother form of lock for which it may be applicable.

In setting the tumblers to permit the unlocking of the bolt suchtumblers should be adjusted in the case until the notches of thetumblers or locking-bars are in alinement, as shown in Fig. 5. In orderto determine When the combination is properly set up to unlock the bolt,the locking-bars or tumblers may have suitable indicating-marks uponthem, so the operator can determine when each tumbler is adj usted tobring its notch in alinement with the longitudinal groove in the case.

It will be noticed that the tumbler-rods or locking-bars are eachprovided at both ends with heads, which limit their movement Within thesectional case, this being desirable, as it avoids a necessity ofproviding any separate means for holding the locking-bars or tumblers inthe case when the sections of the latter are secured together upon thesaid bars.

It Will be noticed that my combination-pad lock is simple inconstruction, can be conveniently set to many diderent combinations,being changeable easily from one combination to another, and thetumblers are so conscnes structed at their ends as to limit theirmovements in the opposite direction by engagement with the case.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isL

The improved lock herein described consisting of the case composed ofsections fitted and bolted together, the bolt operating within saidcaseand having transverse notches, and the tumblers or locking-barsoperating between the sections of the case and arranged to enter thenotches in the bolt and provided with notches, which may be adj ustedinto registry with the bolt to permit the movement thereof into and outof locked position, and said tumblers being provided at both ends withheads for abutment with the case,where by the tumblers are secured inthe case, and 45 THOMAS WILLIAMS HART.

Witnesses:

J. O. M. LENDoN, C. S. LUCAS.

